West Bend to Yellowstone National Park is an approximately 15-hour flight. You can also drive. The time zone difference when traveling from West Bend to Yellowstone National Park is minus 1 hour. Traveling from West Bend in June, expect nights in Yellowstone National Park to be cooler, around 34°F, while days are little chillier, around 66°F. On the 13th (Wed), you'll travel back home.